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Early Late Woodland, ca. A.D. 550 - 850 Newbridge Site, Greene County, Illinois
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Early Decorated Ceramic Jar Fragment.
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Compare the size of ancient corn cob with modern-day corn.
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Photoelectric relay made at Yerkes Observatory, Williams Bay, Wisconsin, with the cooperation of the General Electric Co., and photoelectric cells by R. J. Cashman and W. S. Huxford, 1933. Courtesy of the Adler Planetarium.